The Affordable Care Act created the Center for Medicare & Medicaid Innovation (CMS Innovation Center) within the Centers for Medicare & Medicaid Services (CMS) to “test innovative payment and service delivery models to reduce program expenditures…while preserving or enhancing the quality of care furnished to individuals under” Medicare, Medicaid, and the Children’s Health Insurance Program (CHIP). Since its inception, we have launched more than 50 such innovative models—targeting specific health conditions, care episodes, provider types, and communities. From 2018 to 2020, an estimated 528,000 providers, serving more than 28 million Medicare, Medicaid, and CHIP beneficiaries, participated in these models.